[FFmpeg-devel] [PATCH 19/21] avcodec/pngenc: Use ff_deflate_init/end() wrappers
Andreas Rheinhardt
andreas.rheinhardt at outlook.com
Tue Mar 15 22:06:09 EET 2022
They return nicer error messages.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
---
configure | 6 ++----
libavcodec/png.c | 10 ---------
libavcodec/png.h | 4 ----
libavcodec/pngenc.c | 49 ++++++++++++++++++++++-----------------------
4 files changed, 26 insertions(+), 43 deletions(-)
diff --git a/configure b/configure
index 8f36699d0c..a3d4b224f4 100755
--- a/configure
+++ b/configure
@@ -2761,8 +2761,7 @@ amv_decoder_select="sp5x_decoder exif"
amv_encoder_select="jpegtables mpegvideoenc"
ape_decoder_select="bswapdsp llauddsp"
apng_decoder_select="inflate_wrapper"
-apng_encoder_deps="zlib"
-apng_encoder_select="llvidencdsp"
+apng_encoder_select="deflate_wrapper llvidencdsp"
aptx_decoder_select="audio_frame_queue"
aptx_encoder_select="audio_frame_queue"
aptx_hd_decoder_select="audio_frame_queue"
@@ -2906,8 +2905,7 @@ opus_decoder_deps="swresample"
opus_decoder_select="mdct15"
opus_encoder_select="audio_frame_queue mdct15"
png_decoder_select="inflate_wrapper"
-png_encoder_deps="zlib"
-png_encoder_select="llvidencdsp"
+png_encoder_select="deflate_wrapper llvidencdsp"
prores_decoder_select="blockdsp idctdsp"
prores_encoder_select="fdctdsp"
qcelp_decoder_select="lsp"
diff --git a/libavcodec/png.c b/libavcodec/png.c
index e772eaad26..34f649815a 100644
--- a/libavcodec/png.c
+++ b/libavcodec/png.c
@@ -38,16 +38,6 @@ static const uint8_t ff_png_pass_xshift[NB_PASSES] = {
3, 3, 2, 2, 1, 1, 0
};
-void *ff_png_zalloc(void *opaque, unsigned int items, unsigned int size)
-{
- return av_calloc(items, size);
-}
-
-void ff_png_zfree(void *opaque, void *ptr)
-{
- av_free(ptr);
-}
-
int ff_png_get_nb_channels(int color_type)
{
int channels;
diff --git a/libavcodec/png.h b/libavcodec/png.h
index a15560131f..01171e682e 100644
--- a/libavcodec/png.h
+++ b/libavcodec/png.h
@@ -52,10 +52,6 @@
/* Mask to determine which y pixels are valid in a pass */
extern const uint8_t ff_png_pass_ymask[NB_PASSES];
-void *ff_png_zalloc(void *opaque, unsigned int items, unsigned int size);
-
-void ff_png_zfree(void *opaque, void *ptr);
-
int ff_png_get_nb_channels(int color_type);
/* compute the row size of an interleaved pass */
diff --git a/libavcodec/pngenc.c b/libavcodec/pngenc.c
index 0b75f948d5..b34a94db21 100644
--- a/libavcodec/pngenc.c
+++ b/libavcodec/pngenc.c
@@ -26,6 +26,7 @@
#include "lossless_videoencdsp.h"
#include "png.h"
#include "apng.h"
+#include "zlib_wrapper.h"
#include "libavutil/avassert.h"
#include "libavutil/crc.h"
@@ -56,7 +57,7 @@ typedef struct PNGEncContext {
int filter_type;
- z_stream zstream;
+ FFZStream zstream;
uint8_t buf[IOBUF_SIZE];
int dpi; ///< Physical pixel density, in dots per inch, if set
int dpm; ///< Physical pixel density, in dots per meter, if set
@@ -272,19 +273,20 @@ static void png_write_image_data(AVCodecContext *avctx,
static int png_write_row(AVCodecContext *avctx, const uint8_t *data, int size)
{
PNGEncContext *s = avctx->priv_data;
+ z_stream *const zstream = &s->zstream.zstream;
int ret;
- s->zstream.avail_in = size;
- s->zstream.next_in = data;
- while (s->zstream.avail_in > 0) {
- ret = deflate(&s->zstream, Z_NO_FLUSH);
+ zstream->avail_in = size;
+ zstream->next_in = data;
+ while (zstream->avail_in > 0) {
+ ret = deflate(zstream, Z_NO_FLUSH);
if (ret != Z_OK)
return -1;
- if (s->zstream.avail_out == 0) {
+ if (zstream->avail_out == 0) {
if (s->bytestream_end - s->bytestream > IOBUF_SIZE + 100)
png_write_image_data(avctx, s->buf, IOBUF_SIZE);
- s->zstream.avail_out = IOBUF_SIZE;
- s->zstream.next_out = s->buf;
+ zstream->avail_out = IOBUF_SIZE;
+ zstream->next_out = s->buf;
}
}
return 0;
@@ -432,6 +434,7 @@ static int encode_headers(AVCodecContext *avctx, const AVFrame *pict)
static int encode_frame(AVCodecContext *avctx, const AVFrame *pict)
{
PNGEncContext *s = avctx->priv_data;
+ z_stream *const zstream = &s->zstream.zstream;
const AVFrame *const p = pict;
int y, len, ret;
int row_size, pass_row_size;
@@ -459,8 +462,8 @@ static int encode_frame(AVCodecContext *avctx, const AVFrame *pict)
}
/* put each row */
- s->zstream.avail_out = IOBUF_SIZE;
- s->zstream.next_out = s->buf;
+ zstream->avail_out = IOBUF_SIZE;
+ zstream->next_out = s->buf;
if (s->is_progressive) {
int pass;
@@ -496,14 +499,14 @@ static int encode_frame(AVCodecContext *avctx, const AVFrame *pict)
}
/* compress last bytes */
for (;;) {
- ret = deflate(&s->zstream, Z_FINISH);
+ ret = deflate(zstream, Z_FINISH);
if (ret == Z_OK || ret == Z_STREAM_END) {
- len = IOBUF_SIZE - s->zstream.avail_out;
+ len = IOBUF_SIZE - zstream->avail_out;
if (len > 0 && s->bytestream_end - s->bytestream > len + 100) {
png_write_image_data(avctx, s->buf, len);
}
- s->zstream.avail_out = IOBUF_SIZE;
- s->zstream.next_out = s->buf;
+ zstream->avail_out = IOBUF_SIZE;
+ zstream->next_out = s->buf;
if (ret == Z_STREAM_END)
break;
} else {
@@ -518,7 +521,7 @@ the_end:
av_freep(&crow_base);
av_freep(&progressive_buf);
av_freep(&top_buf);
- deflateReset(&s->zstream);
+ deflateReset(zstream);
return ret;
}
@@ -530,7 +533,8 @@ static int encode_png(AVCodecContext *avctx, AVPacket *pkt,
int enc_row_size;
int64_t max_packet_size;
- enc_row_size = deflateBound(&s->zstream, (avctx->width * s->bits_per_pixel + 7) >> 3);
+ enc_row_size = deflateBound(&s->zstream.zstream,
+ (avctx->width * s->bits_per_pixel + 7) >> 3);
max_packet_size =
AV_INPUT_BUFFER_MIN_SIZE + // headers
avctx->height * (
@@ -858,7 +862,8 @@ static int encode_apng(AVCodecContext *avctx, AVPacket *pkt,
}
}
- enc_row_size = deflateBound(&s->zstream, (avctx->width * s->bits_per_pixel + 7) >> 3);
+ enc_row_size = deflateBound(&s->zstream.zstream,
+ (avctx->width * s->bits_per_pixel + 7) >> 3);
max_packet_size =
AV_INPUT_BUFFER_MIN_SIZE + // headers
avctx->height * (
@@ -1065,23 +1070,17 @@ static av_cold int png_enc_init(AVCodecContext *avctx)
}
s->bits_per_pixel = ff_png_get_nb_channels(s->color_type) * s->bit_depth;
- s->zstream.zalloc = ff_png_zalloc;
- s->zstream.zfree = ff_png_zfree;
- s->zstream.opaque = NULL;
compression_level = avctx->compression_level == FF_COMPRESSION_DEFAULT
? Z_DEFAULT_COMPRESSION
: av_clip(avctx->compression_level, 0, 9);
- if (deflateInit(&s->zstream, compression_level) != Z_OK)
- return -1;
-
- return 0;
+ return ff_deflate_init(&s->zstream, compression_level, avctx);
}
static av_cold int png_enc_close(AVCodecContext *avctx)
{
PNGEncContext *s = avctx->priv_data;
- deflateEnd(&s->zstream);
+ ff_deflate_end(&s->zstream);
av_frame_free(&s->last_frame);
av_frame_free(&s->prev_frame);
av_freep(&s->last_frame_packet);
--
2.32.0
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